4 different dinosaur puzzles: T-Rex, Spinosaurus, Triceratops, and Stegosaurus, with an extra surprise: Turn out the lights to see their bright glow-in-the-dark skeletons! Artist Linda Bleck’s vivid artwork brings these ancient giants to life. Each puzzle is 36 pieces. Puzzles have different color backgrounds for easy sorting. Each puzzle is 12 inches x 15 inches when completed.